Transmission and reverse gear



May l2, 1931. J. B. FISHER ET AL 1,805,137

TRANSMISSION AND REVERSE GEAR Filed Nov. l5, 1928 4 Sheets-Sheet l May 12, 1931. J. B. FISHER ET AL TRANSMISSION AND REVERSE GEAR Filed NOV.. l5, 1928 4 Sheets-Sheet 2 ,m K 6 e- @EN JMW@ mm N mf Z 4 Sheets-Sheet 3 May 12, 1931. J. la.` FISHER ET AL.

TRANSMISSION 'AND REVERSEGEAR Filed Nov. 15, 192s May 12, 1931. J. B. FISHER ET AL 1,805,137

TRANSMISSION AND REVERSE GEAR Filed Nov. 1.5, 1928 4 Sheets-Sheet 4 f 3 is a section tali-en substantially lmatented May 12, 1931 AND JAMES E. DE LONG, GF lVA'UKESHA, WISCONSN, ASSGNORS T0 WESCONSIN TBANSMISSEG rlll'l) REVERSE GEAR Application filed November 15, 19558.

This invention relates to trr emissions. and more particularly to a transn'iission unit adapted for use with internal combustion engines and having both forward and reverse drives.

Qur invention has to do more particularly with a transmission unit especially adapte-1l heavy duty work such as is encountered in oil fields. @ne of tie main objects of our invention is to provide a transmission of con` pact and rugged construction? parti suited for use in oil held operat' other object is to provide a nr which the parts are so reL age.

A further object is to provide a transmission in which the power input shaft can be adjusted so as to project beyond either' end, selectively of the transmission housing thus permitting the motor for driving this shaft to be placed at either end of the transmission housing as conditions may require. Further r objects and advantages will appear from the detailed description.

In the drawings Fig. l is a horizontal sectional View through a transmission in accordance with our invention, the upper section of the housing being removed and parts being shown in ele- Vation;

Fig. 2 is a section taken substantially on line 2-2 of Fig. l;

line 3 3 of Fig. l;

Fig. 4 is a section taken substantially line 4-4 of Fig. l;

rlhe tra, smission is disposed within a -C suitable housing comprising a lower section l and an upper section 2 secured together' by bolts 3 inserted through flanges l and 5 of the upper and lower sections7 respectively. rllhe lower section l includes a base G and an offset 7, certain of the bolts 3 passing through the top wall 7a of this offset. The upper section 2 is provided with a hand hole or opening 8 normally closed by a door or plate 9 secured in position by cap screws or in any other suitable manner.

Serial No. 319,533?.

l1. Retainers l2 are secured to the end walls of the housing in a suitable manner as by means of cap screws7 and receives spacers 13 secured about the shaft l0. An oil thrower 14 is confined between spacer r3 and the inner raceway or ring of the bearing structure ll. The inner rings of the ball bearings are confined bets/'een the oil throwers l-l unil the shoulders at the ends of the snlined portion l5 of shaft lO disposed within the housing, this portion l5 being of greater diameter than the adjacent bearing portion a of the shaft. lThe outer ring bf each bearing structure is held against outward movement by a shoulder 16 of the oil retainer l2. The power input or drive shaft 10 is thus supported for rotation in the housing l and is held against endwise movement therein, it being noted that the ball bearing structures l1 are also thrust bearings to take up any endwise thrust of the sh ft.

A forward drive pinion structure l? splined upon portion of shaft l0. This structure includes a first or low speed pinion 18 and a second or high speed pini-on i9. these two pinions being secured together in a suitable manner, as by being integrally formed. The structure i7 is provided with a neel; El" having a circumferential groove which rcceives the pins of a fork 2l suitably connected to the inner end of a shift arm lhis arm secured, at its outer end, upon the lower end of a rod 23 rocbably mounted through the top wall 7a of offset 7. A shift lever 2d is suitably secured upon the upper end of rod 23, above wall 7o, and projects outwardly in position to be readily grasped by the operator. reverse pinion 25 is splined on portion l5 of shaft 10 and is shiftA d thereon, into and ont of mesh with an idler gear 26, by meansl of a shift arm 2T secured on the lower enpd or a rod 2.8 passing through wall la). a shirt lev r 29 being fixed upon the upper end of this rod. ldler gear 2G is mounted upon a lay shaft 3() suitably secured to the adjacent end wall of the housing. The inner end of the lay shaft 30 is supported by a bracket or standard 3l extending upwardly from the base G. Preferably, an anti-friotion bushing 3Q is disposed about the shaft 30 between the saine and hub 33 of gear 26.

As previously mated7 the splined portion l5 of shaft l0 is of greater diameter than the bearing' shoulder 10a of this shaft. This permits of the pinion structures l and Q5 heilig slid off of the drive shaft toward the left as considered in Fig. l, the spacer and bearinr structure at this` end of the shaft ln.- ing first removed. By this constructiom it is possible to remove the drive shaft and reverse it in the housing, the pinions being; removed from the shaft and replaced thereon fio as to be disposed in proper relation to the `gear structures to be driven by these pinions.

The drive shaft is thus zifljustable so as to project from either end. selectively, of the housine'. This has the advantaggle that the motor to which the drive shaft is, in practice, connected can be placed at either end of the housing as conditions may require.

A driven shaft 34; is mounted in the housing in par; llel relation to the drive shaft l0, this shaft 3st beine' rotatably supported in anti-friction bearingr mean s 35 which have associated therewith oil throvvers and oil retainers, the bearing structures and associated parts being similar to the bearing structures and associated parts for the drive shaft' 10.

A forward drive gear structure 226 is mounted upon a portion Sila of shaft 3l which is of slightly greater diameter than the outer end portion 37 of this shaft. This provides a shoulder which abuts the inner ring of the bearinA structure to hold the shaft against endvise moven-ient in one direction. The gear structure 3G includes a hub member comprising a hub 3S lnivingg` a radial flange 89 from the periphery of which extends an axially disposed liant/e l0 provided at its outer end with a ra ially posed lia-nge fall. The flanges 39 and l() are connected to iach other and o the hub 35S by relatively Wide radial spk s or ribs e2. Flange itl is secured in a as by means of set screws which seats upon the outer are of liz nge Ll0. This drum carries, at its outer 1rd, a. lirst or low speed gear The drinn 4l projects invardly a relatively great distai ce beyond flange 39 and carries, at its inner end. a se fond or high speed gear 46. rfhe hub 3e isp` 'l erably mounted upon bushimgs` el? bushing l? being provideth at its outer end, with a. pcriphe 'al flange L.l-Ta which contacts the inner end of au angular spacing;- collar 49 disposed about portion 34a of shaft 3l ant1 conined between the end Wall of 4fhe housingl and the bushing. The forward drive gear structure is thus loosely mounted r:i shaft 3l and the hub 8S of apgn'oximately the same length as the drum -l-l and teje: rs and 4G, this hub havinlgl` ample bei ring` surface, which desirable as preventing any undue looseness or play of the j.; r r structure upon the shaft.

A reverse drive gear structure is mounted upon portion 5() f sha' :lil adjacent the other end of the iousii this portion 50 being of the same diamo er as portion 31M. rlhe reverse drive grear f las '-1 Jtructure includes i drum 5l lnuing,` a hub o2 mounten upon portion 50 of the shaft, a bi onze lmshing 53 being; preferably disposed lnetv.' en this hub and the shaft. This bushing' has an outer ilange at its outer end which is conlined between hub 52 and spacing collar 55. the outer face of'vvhich abuts the end Wall of the housing. lt will. be noted that the hub 52 is of somewha ejreater length than the drum 51, thus providing' ample bearingfor the drum. which is oesirable.

This drum carries a reverse IQ'ear 55 which meshes with the idler `gear QG, it being,` noted that the drum 5l is also loose upon the driven shaft- ?il. The pinions 'i8 and 19 of the pinion structur'-x l? are adapted to mesh with the gears lo and l-f. respectively. this pinion structure being; shifted so as to bringl the pinions into mesh with the gears7V selectively, or to dispose the pinion ucture in inoperative position with the pinions thereof out of mesh with both of the `geruis1 as is known.

Tvle provide means for selectively elutching; the gear structures 'to the driven shaft Sln'hereby this shaft may le driven forwardly at either one of the two forward drive means, or fan be driven inversely, option ally. Any suitable or preferred type of clutch structure may be employed for this purposea though We p "er to employ the friction clutch illustrated. This clutch may include a hub 5( which is secured to a central iortion 5S of shaft Se, of increased diameter, in a suitable manner as by being' keyed thereon as at 59. This hub is recesed from e: ch en d to provide7 in ell'ect., end sleeves Gl) whirl] receive huh 5.*2 of drum 51 and the inner portion of hub 3S. these sleeves extending into the drums :3l and lll. The hub 57 of the cl itch structure is thus disposed betweeii the hub of the gear structures and may serve the fumtion of a spacing` member to prevent endwise movenjient of the structures toward each other.

ly havingl the hub of the clu ich structure recessed from its endsK to provide sleevesl (Si), it is possible to dispose the clutch structure l etvveen the gea r structures without increasing the o y'er-all length of the housing' to a material erfctent9 the hub 5T beiner comparatively short.

n .collar 6l is loosely mounted upon hub 7 for sliding movement axially thereof.

ns collar provided with central dialnetrically opposite lugs ($2 Fing ll) which receive pins (33 passing l fork (i-l at the ii ne: end

nrough the arm of a of a shift arm (S5 seti i) lli() llt fede-e element 69 oaerates cured on the lower end of a rod 66 passingl through the top wall 7a. of offset 7. A shift lever (not shown) is secured on the upper end of the rod 66 for actuating the same to shift the collar G1 in the desired vdirection upon the hub 57. Two rings 67 are loosely mounted upon the collar G1 and are held spaced apart thereon axially thereof. These rings are confined against movement from each other in a suitable manner, as by means of flanges at the end of collar G1 extending into rabbe'ts at the outer end of the ring 67, as illustrated.

An arm 68 entends from one of the rings 67 and is provided at its outer end with a wedge element 69 which is connected, by tongue and slot connections (Figs. 2 and 3), to a boss 70 projecting from a split collar 71 loosely mounted about sleeve G0 of hub 57. between two rollers 72 mounted on the arms of a toggle lover structure 73 connecting the ends of the two sections 74a of an expansible clutch band 7 4.

rlhe sections 74a are connected at their other ends by a suitable joint 75 and this band is normally held contracted by springs 7G se fured to the boss 70 at the side thereof, these springs being suitably connected by members 77 to sections 74a. the connecting members being preferably adjustable. Then the collar 61 is shifted toward the right, as considered in TEigs. 1 and 4, beyond neutral position, the wedge element 69 engages between the roll `rs 72 and opens the toggle expanding the clutch band 74, which is preferably provided with a facing of friction material 78, such as leather, into close Contact with vthe surrounding flange of drum 51, the inner face of which is finished and polished for cooperation with the band. The Ydrum 51 is thus clutched to the band 74.

Sleeve 00 which extends into the drum 51, provided with two integral arms 79 disposed oppositely to the boss 70, these arms being spaced apart lengthwise of the sleeve. 'i'he split collar 7l is disposed between the two arms 7 9 and a bloeit 30 secured between the outer ends of these arms by a pin 8l passing through the arms and the bloeit, Lhis pin being secured in position 'by locking plates 82. The block 80 is slidabiy mounted between lugs 83 project-ing inwardly from the Sections 7 4a of clutch band 74, these lugs being connected by a strap 84 secured thereto.

When it is desired to'drive the shaft 34 in reverse direction, reverse pinion 25 is shifted into mesh with idler gear 26, the pinion structure 17 being first moved into inoperative position. The collar 61 is then shifted from neutral position toward the right expanding the clutch band 74 into gripping contact with the drum 51 which is, at this time, being driven from the shaft 10 through the pinion 25 and gears 26 and A ln 56. The clutch band 74 is then driven with the drum 51 and drives the shaft 34 in reverse direction through the lugs 83, block 80, pin 81, arms 79 and hub 57 which is keyed to the shaft. x

A clutch is provided at the outer end of the other sleeve 60 of hub 57 for clutching the same to the drum' 44, this clutch being disposed within the drum. The clutch within the drum 44 may be of similar construction and operation to the clutch within the drum 51, though ordinarily we prefer to use a clutch of somewhat different construction. The clutch within drum 44 includes a clutch band 74 which is constructed and operated similarly to the band 74 of the clutch for drum 51. Referring more particularly to Figs. 2 and 4, the band 7 4 is not connected to the sleeve 60 but, at a point diametrically opposite to the toggle lever structure, is provided with lugs 86 connected by a strap 87 and receiving between them an arm 85.

The band 74 is connected by arm 85 and lugs 86 to a split collar 71a secured about sleeve 60 and free to turn thereon. rl`ho clutch band 74 is thus mounted for turning movement with drum 44. Band 74 is disposed between two outer clutch bands 88 constructed similarly to clutch band 74. The sections of each of the bands 88 are con" nected at one end by a suitable joint or connection 89 and, at their other end, by a toggle structure 90. Lugs 90a bridge the clutch band 74 and connect the sections of the bands 88 adjacent the joint 89 thereof. A block 91 is slidably mounted between these lugs and is secured, by a pin 92, between the outer ends of a pair of arms 93 formed integrally with sleeve 60. A locking plate 94 is mounted on each of the arms 93 and locks the pin 92 against endwise movement. The lugs 90a are connected by a strap 95 secured thereto. A bracket or angle arm 96 is suitably secured to a boss 97 on sleeve 60 at one side of the clutch band and is disposed in alignment with an arm 98 at the other side of the band and formed integrally with sleeve 00. These arms are provided with suitable slots 99 for guiding the pin 100 which connects the arms of the toggle structure 90 to the sections of the clutch band 88. Collar 71a is provided with a pin or tooth 101 disposed betwen the inner ends of the arms of the toggle 90.

An arm 102 projects from the other ring u 67 and carries. its outer end, a wedge element 103 which operates between the rollers on the arms of the toggle structure 73 of the inner clutch band 74.

The wedge member 103 is oppositely related to the wedge member 69 of the clutch within drum 51. When the collar 61 is in its inoperative position, that is, is in neutral position as illustrated in Fig. 1, both of the wedge members arekin inoperative or neutral position and the two gear structures are free from sha-ft 34. T o drive the shaft 34 in forward direction, the pinion structure 17 is shifted into mesh with the gear structure 30 Awith pinion 18 meshing gear 45, or pinion 19 meshing gear 4G, depending ,upon whether it is desire-d to drive shaft 34 at low speed or at second or high speed. Collar 61 is then moved to the left, as considered in Fig'. 1, thus clutching the band 7 4 to drum 44 which is now driven. Band 74 rotates with the druml thus turning the collar 71e and causing pin or tooth 101 to operate the toggle 90 so as to expand the clutch bands 88 which act to clutch the sleeve 60 to drum 44 establishing driving connection between this drum and shaft 34. rlhe inner face of drum 44 is machined and polished to provide a surface adapted for clutcl'iing cooperation with the bands of the clutching' structure within this drum.

By constructing and arranging the. clutch structure as illustrated and described, the unit as a whole is compact, while beine,l rue'- ged and well able to withstand the stresses to which` it is subjected in use, and either of the gear structures desired can be quickly clutched to shaft 34 for drivingit in the de sired direction.

A pulley wheel 104 is secured ou shaft 34 at one end of the housing. The shaft eX- tends outwardly beyond the pulley and thc end of the shaft is mounted in a ball bearing structure 105 similar to the structures in which the shaft is mounted in the housing. A flat plate 100 is secured in a suitable inanner, as by means of cap screws 107, to the end of the shaft and abuts the outer end of the inner ring or race of the bearing 105. A cap plate 108 is suitably secured to a bracket lframe 109 of substantially U-shape, this frame beingy provided with a relatively wide collar 110'which supports bearing' structure 105 and to whichv plate 108 and oil retainer 111 are suitably secured. The bracket frame 109 is of substantially U-shape and is disposed vertically about pulley wheel 104, the ends of this frame being secured to the upper and lower sections of the end of the housing' in a suitable manner, as by means of :ap screws 112. A brake drum 113 is secured on the other end of sl aft 34 for cooperation with a brake band 114 of known type disposed about the drun'i.`

Band 114 is normally held expanded out of contact with drum 118 in a i'nanner well understood in the art. This brake band may be operated in a suitable manner, by means of suitable connection to an arm 115 secured on the lower end of a rod 110 rockably mounted in the top wall 7a of offset 7, this arm extendingT through a suitable slot or opening' in the wall of the offset. A brake lever (not shown), may be secured on the upper end of rod 116 for operating the brake band.

The brake band may, of course, be operated are uniformly distributed and the unit as a whole is of rugged construction and well adapted for the heavy work to which it is subjected in use.

lVhat we claim 1. ln a transmission, a driven shaft, a forward drive gear structure having` a hub loose on the shaft, a reverse drive gear strueti re having` a hub lo?I e on the shaft, a driving` hub keyed on the shaft between the gear structures and having' its ends recessed. the recessed ends of the d riving hub providing sleeves receiving' the hubs of and extendinginto the La'ear structures, said pjear structures being' held against movement away from each other and the drivino' hub acting' to space the gear structures apart and to h old them against movement toward each other, said gear strucV4 tures being open at their inner ends and constituting clutch drums, means at 'the ends of said sleeves and com ieratingal with the drums for clutching' either of the ne: r structures. optionally, to the driven shaft, a drive sha il', and means for establishing' drivine' conne t tions between the drive shaft and eicher of Jdie zg'ear structures, optionally.

2. In a transmission, a driven slraft` gear structures each having a hub loose on tl'e shaft, a hub keyed on the shaft between the ejear structures and having' its ends recessed, the recessed ends of the hub keyed on the shaft receiving' the hubs of the y@gear structures, said gear structures being,` held against movement away from each other and the hub which' is keyed on the shaft serving to space the gear structures apart and hold them against movement toward each other.` means for Optionally establishing driving conne."- tions between the nnb keyed on the shall' and the gear structures, selectively, for drivingz` the shaft through the hub keyed thereon. a drive shaft, and means for establishineA driving connections between the drive shaft and the gear structures, selectively.

In witness whereof, ive hereunto subscribe our names this 9th dav of November. 1028.

JAMES B. FISHER. JAMES E. DE LONG.

lll.; 

